1
|
Ben Akacha B, Ben Hsouna A, Generalić Mekinić I, Ben Belgacem A, Ben Saad R, Mnif W, Kačániová M, Garzoli S. Salvia officinalis L. and Salvia sclarea Essential Oils: Chemical Composition, Biological Activities and Preservative Effects against Listeria monocytogenes Inoculated into Minced Beef Meat. PLANTS (BASEL, SWITZERLAND) 2023; 12:3385. [PMID: 37836125 PMCID: PMC10574192 DOI: 10.3390/plants12193385] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/18/2023] [Accepted: 09/22/2023] [Indexed: 10/15/2023]
Abstract
In this study, Salvia officinalis L. and Salvia sclarea essential oils (EOs) were investigated using gas chromatography-mass spectrometry (GC-MS) to describe their chemical composition. The obtained results show, for both EOs, a profile rich in terpene metabolites, with monoterpenes predominating sesquiterpenes but with significant qualitative and quantitative differences. The main compound found in the Salvia officinalis EO (SOEO) was camphor (19.0%), while in Salvia sclarea EO (SCEO), it was linalyl acetate (59.3%). Subsequently, the in vitro antimicrobial activity of the EOs against eight pathogenic strains was evaluated. The disc diffusion method showed a significant lysis zone against Gram-positive bacteria. The minimum inhibitory concentrations (MICs) ranged from 3.7 mg/mL to 11.2 mg/mL, indicating that each EO has specific antimicrobial activity. Both EOs also showed significant antiradical activity against DPPH radicals and total antioxidant activity. In addition, the preservative effect of SOEO (9.2%) and SCEO (9.2%), alone or in combination, was tested in ground beef, and the inhibitory effect against Listeria monocytogenes inoculated into the raw ground beef during cold storage was evaluated. Although the effect of each individual EO improved the biochemical, microbiological, and sensory parameters of the samples, their combination was more effective and showed complete inhibition of L. monocytogenes after 7 days of storage at 4 °C. The results show that both EOs could be used as safe and natural preservatives in various food and/or pharmaceutical products.
Collapse
Affiliation(s)
- Boutheina Ben Akacha
- Laboratory of Biotechnology and Plant Improvement, Centre of Biotechnology of Sfax, B.P “1177”, Sfax 3018, Tunisia; (B.B.A.); (A.B.H.); (A.B.B.); (R.B.S.)
| | - Anis Ben Hsouna
- Laboratory of Biotechnology and Plant Improvement, Centre of Biotechnology of Sfax, B.P “1177”, Sfax 3018, Tunisia; (B.B.A.); (A.B.H.); (A.B.B.); (R.B.S.)
- Department of Environmental Sciences and Nutrition, Higher Institute of Applied Sciences and Technology of Mahdia, University of Monastir, Monastir 5000, Tunisia
| | - Ivana Generalić Mekinić
- Department of Food Technology and Biotechnology, Faculty of Chemistry and Technology, University of Split, R. Boškovića 35, HR-21000 Split, Croatia;
| | - Améni Ben Belgacem
- Laboratory of Biotechnology and Plant Improvement, Centre of Biotechnology of Sfax, B.P “1177”, Sfax 3018, Tunisia; (B.B.A.); (A.B.H.); (A.B.B.); (R.B.S.)
| | - Rania Ben Saad
- Laboratory of Biotechnology and Plant Improvement, Centre of Biotechnology of Sfax, B.P “1177”, Sfax 3018, Tunisia; (B.B.A.); (A.B.H.); (A.B.B.); (R.B.S.)
| | - Wissem Mnif
- Department of Chemistry, College of Sciences at Bisha, University of Bisha, P.O. Box 199, Bisha 61922, Saudi Arabia;
| | - Miroslava Kačániová
- Faculty of Horticulture, Institute of Horticulture, Slovak University of Agriculture, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia;
| | - Stefania Garzoli
- Department of Chemistry and Technologies of Drug, Sapienza University, P. le Aldo Moro, 5, 00185 Rome, Italy
| |
Collapse
|
2
|
Funk RHW, Scholkmann F. The significance of bioelectricity on all levels of organization of an organism. Part 1: From the subcellular level to cells. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2023; 177:185-201. [PMID: 36481271 DOI: 10.1016/j.pbiomolbio.2022.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/24/2022] [Accepted: 12/03/2022] [Indexed: 12/12/2022]
Abstract
Bioelectricity plays an essential role in the structural and functional organization of biological organisms. In this first article of our three-part series, we summarize the importance of bioelectricity for the basic structural level of biological organization, i.e. from the subcellular level (charges, ion channels, molecules and cell organelles) to cells.
Collapse
Affiliation(s)
- Richard H W Funk
- Institute of Anatomy, Center for Theoretical Medicine, TU-Dresden, 01307, Dresden, Germany; Dresden International University, 01067, Dresden, Germany.
| | - Felix Scholkmann
- Biomedical Optics Research Laboratory, Department of Neonatology, University Hospital Zurich, University of Zurich, 8091, Zurich, Switzerland.
| |
Collapse
|
3
|
Javanshad R, Venter AR. Effects of amino acid additives on protein solubility - insights from desorption and direct electrospray ionization mass spectrometry. Analyst 2021; 146:6592-6604. [PMID: 34586125 DOI: 10.1039/d1an01392k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Naturally occurring amino acids have been broadly used as additives to improve protein solubility and inhibit aggregation. In this study, improvements in protein signal intensity obtained with the addition of L-serine, and structural analogs, to the desorption electrospray ionization mass spectrometry (DESI-MS) spray solvent were measured. The results were interpreted at the hand of proposed mechanisms of solution additive effects on protein solubility and dissolution. DESI-MS allows for these processes to be studied efficiently using dilute concentrations of additives and small amounts of proteins, advantages that represent real benefits compared to classical methods of studying protein stability and aggregation. We show that serine significantly increases the protein signal in DESI-MS when native proteins are undergoing unfolding during the dissolution process with an acidic solvent system (p-value = 0.0001), or with ammonium bicarbonate under denaturing conditions for proteins with high isoelectric points (p-value = 0.001). We establish that a similar increase in the protein signal cannot be observed with direct ESI-MS, and the observed increase is therefore not related to ionization processes or changes in the physical properties of the bulk solution. The importance of the presence of serine during protein conformational changes while undergoing dissolution is demonstrated through comparisons between the analyses of proteins deposited in native or unfolded states and by using native state-preserving and denaturing desorption solvents. We hypothesize that direct, non-covalent interactions involving all three functional groups of serine are involved in the beneficial effect on protein solubility and dissolution. Supporting evidence for a direct interaction include a reduction in efficacy with D-serine or the racemic mixture, indicating a non-bulk-solution physical property effect; insensitivity to the sample surface type or relative placement of serine addition; and a reduction in efficacy with any modifications to the serine structure, most notably the carboxyl functional group. An alternative hypothesis, also supported by some of our observations, could involve the role of serine clusters in the mechanism of solubility enhancement. Our study demonstrates the capability of DESI-MS together with complementary ESI-MS experiments as a novel tool for understanding protein solubility and dissolution and investigating the mechanism of action for solubility-enhancing additives.
Collapse
Affiliation(s)
- Roshan Javanshad
- Department of Chemistry, Western Michigan University, Kalamazoo, MI 49008-5413, USA.
| | - Andre R Venter
- Department of Chemistry, Western Michigan University, Kalamazoo, MI 49008-5413, USA.
| |
Collapse
|
4
|
Yan H, Dong J, Huang X, Du X. Protein-Gated Upconversion Nanoparticle-Embedded Mesoporous Silica Nanovehicles via Diselenide Linkages for Drug Release Tracking in Real Time and Tumor Chemotherapy. ACS APPLIED MATERIALS & INTERFACES 2021; 13:29070-29082. [PMID: 34101411 DOI: 10.1021/acsami.1c04447] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Two novel stimuli-responsive drug delivery systems (DDSs) were successfully created from bovine serum albumin- or myoglobin-gated upconversion nanoparticle-embedded mesoporous silica nanovehicles (UCNP@mSiO2) via diselenide (Se-Se)-containing linkages. More importantly, multiple roles of each scaffold of the nanovehicles were achieved. The controlled release of the encapsulated drug doxorubicin (DOX) within the mesopores was activated by triple stimuli (acidic pH, glutathione, or H2O2) of tumor microenvironments, owing to the conformation/surface charge changes in proteins or the reductive/oxidative cleavages of the Se-Se bonds. Upon release of DOX, the Förster resonance energy transfer between the UCNP cores and encapsulated DOX was eliminated, resulting in an increase in ratiometric upconversion luminescence for DOX release tracking in real time. The two protein-gated DDSs showed some differences in the drug release performances, relevant to structures and properties of the protein nanogates. The introduction of the Se-Se linkages not only increased the versatility of reductive/oxidative cleavages but also showed less cytotoxicity to all cell lines. The DOX-loaded protein-gated nanovehicles showed the inhibitory effect on tumor growth in tumor-bearing mice and negligible damage/toxicity to the normal tissues. The constructed nanovehicles in a spatiotemporally controlled manner have fascinating prospects in targeted drug delivery for cancer chemotherapy.
Collapse
Affiliation(s)
- Hua Yan
- Key Laboratory of Mesoscopic Chemistry (Ministry of Education), State Key Laboratory of Coordination Chemistry, and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou, Zhejiang Province 318000, People's Republic of China
| | - Jiangtao Dong
- Key Laboratory of Mesoscopic Chemistry (Ministry of Education), State Key Laboratory of Coordination Chemistry, and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Xuan Huang
- Key Laboratory of Mesoscopic Chemistry (Ministry of Education), State Key Laboratory of Coordination Chemistry, and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Xuezhong Du
- Key Laboratory of Mesoscopic Chemistry (Ministry of Education), State Key Laboratory of Coordination Chemistry, and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| |
Collapse
|
5
|
Brasili F, Capocefalo A, Palmieri D, Capitani F, Chiessi E, Paradossi G, Bordi F, Domenici F. Assembling patchy plasmonic nanoparticles with aggregation-dependent antibacterial activity. J Colloid Interface Sci 2020; 580:419-428. [DOI: 10.1016/j.jcis.2020.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 02/08/2023]
|
6
|
Suleiman E, Mayer J, Lehner E, Kohlhauser B, Katholnig A, Batzoni M, Damm D, Temchura V, Wagner A, Überla K, Vorauer-Uhl K. Conjugation of Native-Like HIV-1 Envelope Trimers onto Liposomes Using EDC/Sulfo-NHS Chemistry: Requirements and Limitations. Pharmaceutics 2020; 12:E979. [PMID: 33081278 PMCID: PMC7589475 DOI: 10.3390/pharmaceutics12100979] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/13/2020] [Accepted: 10/13/2020] [Indexed: 12/29/2022] Open
Abstract
The display of native-like human immunodeficiency virus type 1 envelope (HIV-1 Env) trimers on liposomes has gained wide attention over the last few years. Currently, available methods have enabled the preparation of Env-liposome conjugates of unprecedented quality. However, these protocols require the Env trimer to be tagged and/or to carry a specific functional group. For this reason, we have investigated N-(3-Dimethylaminopropyl)-N'-ethylcarbodiimide/N-Hydroxysulfosuccinimide (EDC/Sulfo-NHS) chemistry for its potential to covalently conjugate tag-free, non-functionalized native-like Env trimers onto the surface of carboxyl-functionalized liposomes. The preservation of the liposome's physical integrity and the immunogen's conformation required a fine-tuned two-step approach based on the controlled use of β-mercaptoethanol. The display of Env trimers was strictly limited to activated liposomes of positive charge, i.e., liposomes with a positive zeta potential that carry amine-reactive Sulfo-NHS esters on their surface. In agreement with that, conjugation was found to be highly ionic strength- and pH-dependent. Overall, we have identified electrostatic pre-concentration (i.e., close proximity between negatively charged Env trimers and positively charged liposomes established through electrostatic attraction) to be crucial for conjugation reactions to proceed. The present study highlights the requirements and limitations of potentially scalable EDC/Sulfo-NHS-based approaches and represents a solid basis for further research into the controlled conjugation of tag-free, non-functionalized native-like Env trimers on the surface of liposomes, and other nanoparticles.
Collapse
Affiliation(s)
- Ehsan Suleiman
- Polymun Scientific Immunbiologische Forschung GmbH, 3400 Klosterneuburg, Austria;
- Department of Biotechnology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (J.M.); (E.L.); (B.K.); (A.K.); (M.B.); (K.V.-U.)
| | - Julia Mayer
- Department of Biotechnology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (J.M.); (E.L.); (B.K.); (A.K.); (M.B.); (K.V.-U.)
| | - Elisabeth Lehner
- Department of Biotechnology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (J.M.); (E.L.); (B.K.); (A.K.); (M.B.); (K.V.-U.)
| | - Bianca Kohlhauser
- Department of Biotechnology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (J.M.); (E.L.); (B.K.); (A.K.); (M.B.); (K.V.-U.)
- University of Vienna, 1010 Vienna, Austria
| | - Alexandra Katholnig
- Department of Biotechnology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (J.M.); (E.L.); (B.K.); (A.K.); (M.B.); (K.V.-U.)
| | - Mirjam Batzoni
- Department of Biotechnology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (J.M.); (E.L.); (B.K.); (A.K.); (M.B.); (K.V.-U.)
- FH Campus Wien, University of Applied Sciences, 1100 Vienna, Austria
| | - Dominik Damm
- Institute of Clinical and Molecular Virology, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (D.D.); (V.T.); (K.Ü.)
| | - Vladimir Temchura
- Institute of Clinical and Molecular Virology, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (D.D.); (V.T.); (K.Ü.)
| | - Andreas Wagner
- Polymun Scientific Immunbiologische Forschung GmbH, 3400 Klosterneuburg, Austria;
| | - Klaus Überla
- Institute of Clinical and Molecular Virology, Universitätsklinikum Erlangen, 91054 Erlangen, Germany; (D.D.); (V.T.); (K.Ü.)
| | - Karola Vorauer-Uhl
- Department of Biotechnology, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (J.M.); (E.L.); (B.K.); (A.K.); (M.B.); (K.V.-U.)
| |
Collapse
|
7
|
Jiang M, Yang L, Chen Z, Lai S, Zheng J, Peng B. Exogenous maltose enhances Zebrafish immunity to levofloxacin-resistant Vibrio alginolyticus. Microb Biotechnol 2020; 13:1213-1227. [PMID: 32364684 PMCID: PMC7264874 DOI: 10.1111/1751-7915.13582] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 12/18/2022] Open
Abstract
Understanding the interplay between bacterial fitness, antibiotic resistance, host immunity and host metabolism could guide treatment and improve immunity against antibiotic-resistant pathogens. The acquisition of levofloxacin (Lev) resistance affects the fitness of Vibrio alginolyticus in vitro and in vivo. Lev-resistant (Lev-R) V. alginolyticus exhibits slow growth, reduced pathogenicity and greater resistance to killing by the host, Danio rerio (zebrafish), than Lev-sensitive (Lev-S) V. alginolyticus, suggesting that Lev-R V. alginolyticus triggers a weaker innate immune response in D. rerio than Lev-S V. alginolyticus. Differences were detected in the metabolome of D. rerio infected with Lev-S or Lev-R V. alginolyticus. Maltose, a crucial metabolite, is significantly downregulated in D. rerio infected with Lev-R V. alginolyticus, and exogenous maltose enhances the immune response of D. rerio to Lev-R V. alginolyticus, leading to better clearance of the infection. Furthermore, we demonstrate that exogenous maltose stimulates the host production of lysozyme and its binding to Lev-R V. alginolyticus, which depends on bacterial membrane potential. We suggest that exogenous exposure to crucial metabolites could be an effective strategy for treating and/or managing infections with antibiotic-resistant bacteria.
Collapse
Affiliation(s)
- Ming Jiang
- The Third Affiliated HospitalState Key Laboratory of BiocontrolGuangdong Key Laboratory of Pharmaceutical Functional GenesSchool of Life SciencesSun Yat-sen UniversityGuangzhou510275China
- Laboratory for Marine Biology and BiotechnologyQingdao National Laboratory for Marine Science and TechnologyQingdao266071China
| | - Lifen Yang
- The Third Affiliated HospitalState Key Laboratory of BiocontrolGuangdong Key Laboratory of Pharmaceutical Functional GenesSchool of Life SciencesSun Yat-sen UniversityGuangzhou510275China
| | - Zhuang‐gui Chen
- The Third Affiliated HospitalState Key Laboratory of BiocontrolGuangdong Key Laboratory of Pharmaceutical Functional GenesSchool of Life SciencesSun Yat-sen UniversityGuangzhou510275China
| | - Shi‐shi Lai
- The Third Affiliated HospitalState Key Laboratory of BiocontrolGuangdong Key Laboratory of Pharmaceutical Functional GenesSchool of Life SciencesSun Yat-sen UniversityGuangzhou510275China
| | - Jun Zheng
- Faculty of Health SciencesUniversity of MacauMacau SARChina
| | - Bo Peng
- The Third Affiliated HospitalState Key Laboratory of BiocontrolGuangdong Key Laboratory of Pharmaceutical Functional GenesSchool of Life SciencesSun Yat-sen UniversityGuangzhou510275China
- Laboratory for Marine Biology and BiotechnologyQingdao National Laboratory for Marine Science and TechnologyQingdao266071China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)Zhuhai519000China
| |
Collapse
|
8
|
Laomeephol C, Guedes M, Ferreira H, Reis RL, Kanokpanont S, Damrongsakkul S, Neves NM. Phospholipid-induced silk fibroin hydrogels and their potential as cell carriers for tissue regeneration. J Tissue Eng Regen Med 2019; 14:160-172. [PMID: 31671250 DOI: 10.1002/term.2982] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/25/2019] [Accepted: 10/03/2019] [Indexed: 12/11/2022]
Abstract
Silk fibroin (SF) hydrogels can be obtained via self-assembly, but this process takes several days or weeks, being unfeasible to produce cell carrier hydrogels. In this work, a phospholipid, namely, 1,2-dimyristoyl-sn-glycero-3-phospho-(1'-rac-glycerol) sodium salt (DMPG), was used to induce and accelerate the gelation process of SF solutions. Due to the amphipathic nature and negative charge of DMPG, electrostatic and hydrophobic interactions between the phospholipids and SF chains will occur, inducing the structural transition of SF chains to the beta sheet and consequently a rapid gel formation is observed (less than 50 min). Moreover, the gelation time can be controlled by varying the lipid concentration. To assess the potential of the hydrogels as cell carriers, several mammalian cell lines, including L929, NIH/3T3, SaOS-2, and CaSki, were encapsulated into the hydrogel. The silk-based hydrogels supported the normal growth of fibroblasts, corroborating their cytocompatibility. Interestingly, an inhibition in the growth of cancer-derived cell lines was observed. Therefore, DMPG-induced SF hydrogels can be successfully used as a 3D platform for in situ cell encapsulation, opening promising opportunities in biomedical applications, such as in cell therapies and tissue regeneration.
Collapse
Affiliation(s)
- Chavee Laomeephol
- Biomedical Engineering Program, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand.,Biomaterial Engineering for Medical and Health Research Unit, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Marta Guedes
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Helena Ferreira
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.,The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Guimarães, Portugal
| | - Sorada Kanokpanont
- Biomedical Engineering Program, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand.,Biomaterial Engineering for Medical and Health Research Unit, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand.,Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Siriporn Damrongsakkul
- Biomedical Engineering Program, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand.,Biomaterial Engineering for Medical and Health Research Unit, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand.,Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Nuno M Neves
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.,The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Guimarães, Portugal
| |
Collapse
|
9
|
Physicochemical mechanisms of different biopolymers' (lysozyme, gum arabic, whey protein, chitosan) adsorption on green tea extract loaded liposomes. Int J Biol Macromol 2019; 138:473-482. [PMID: 31325502 DOI: 10.1016/j.ijbiomac.2019.07.106] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/16/2019] [Accepted: 07/16/2019] [Indexed: 01/25/2023]
Abstract
Having various domains of applicability, liposomes have been the issue of many studies since 1960s. Kinetically stable nature of liposomes required incorporation of other substituents to gain storage stability and interaction of liposomes with polymers, electrolytes, proteins or lipids still requires further investigation to explain the underlying mechanism. In this study, polyphenol-rich green tea extract was encapsulated into liposomes by means of microfluidization in two different aqueous media (pH = 3.8 acetate buffer and pH = 6.5 distilled water). Antioxidant loaded vesicles were further mixed with anionic biopolymers (gum arabic, whey protein) and cationic biopolymers (lysozyme, chitosan) separately. The physical and chemical interactions between liposomes and biopolymers were rationalized by particle size, zeta potential, transmission electron microscopy, total phenolic content and antioxidant activity measurements during 28-days storage at 4 °C. Experimental results indicated that the biopolymer incorporated liposomes showed better stability compared to control liposomes during storage, developing resistance against changes in particle size and zeta potential. On the other hand, biopolymer interaction mechanisms were shown to be different for different biopolymers. As was also proved by transmission electron microscopy, lysozyme was absorbed into the liposomes while gum arabic, whey protein and chitosan were adsorbed on the vesicle surface to shield green tea extract loaded liposomes.
Collapse
|
10
|
Mortensen DN, Williams ER. Electrothermal supercharging of proteins in native MS: effects of protein isoelectric point, buffer, and nanoESI-emitter tip size. Analyst 2016; 141:5598-606. [PMID: 27441318 PMCID: PMC5239670 DOI: 10.1039/c6an01380e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The extent of charging resulting from electrothermal supercharging for protein ions formed from various buffered aqueous solutions using nanoESI emitters with tip diameters between ∼1.5 μm and ∼310 nm is compared. Charging increases with decreasing tip size for proteins that are positively charged in solution but not for proteins that are negatively charged in solution. These results suggest that Coulombic attraction between positively charged protein molecules and the negatively charged glass surfaces in the tips of the emitters causes destabilization and even unfolding of proteins prior to nanoESI. Coulombic attraction to the negatively charged glass surfaces does not occur for negatively charged proteins and the extent of charging with electrothermal supercharging decreases with decreasing tip size. Smaller droplets are formed with smaller tips, and these droplets have shorter lifetimes for protein unfolding with electrothermal supercharging to occur prior to gaseous ion formation. Results from this study demonstrate simple principles to consider in order to optimize the extent of charging obtained with electrothermal supercharging, which should be useful for obtaining more structural information in tandem mass spectrometry.
Collapse
Affiliation(s)
- Daniel N Mortensen
- Department of Chemistry, University of California, Berkeley, California 94720-1460, USA.
| | | |
Collapse
|
11
|
Mortensen DN, Williams ER. Surface-Induced Protein Unfolding in Submicron Electrospray Emitters. Anal Chem 2016; 88:9662-9668. [PMID: 27615434 DOI: 10.1021/acs.analchem.6b02499] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The charging of protein ions formed by nanoelectrospray ionization (nanoESI) with tips that are between 1.5 μm and 250 nm in outer diameter is compared. More charging is obtained with the smaller tip sizes for proteins that have a net positive charge in solution, and additional high-charge-state distributions are often observed. A single charge-state distribution of holo-myoglobin ions is produced by nanoESI from a slightly acidified aqueous solution with the micron outer diameter tips, but some apo-myoglobin ions are produced with the submicron tips. In contrast, the charge-state distributions for proteins with a net negative charge in solution do not depend on tip size. Both the formation of high charge states and the appearance of higher-charge-state distributions, as well as the loss of the heme group from myoglobin, indicate that a fraction of the protein population is unfolding with the smaller tips. The increased charging with the smaller tip sizes for proteins with a net positive charge but not for proteins with a net negative charge indicates that the unfolding occurs prior to nanoelectrospray ionization as a result of Coulombic attraction between positively charged protein molecules in solution and the glass surfaces of the emitter tips that are negatively charged. These results demonstrate a novel method for producing highly charged protein ions that does not require exposing the proteins to additional chemicals either in solution or in the gas phase.
Collapse
Affiliation(s)
- Daniel N Mortensen
- Department of Chemistry, University of California , Berkeley, California 94720-1460, United States
| | - Evan R Williams
- Department of Chemistry, University of California , Berkeley, California 94720-1460, United States
| |
Collapse
|
12
|
An injectable liquid crystal system for sustained delivery of entecavir. Int J Pharm 2015; 490:265-72. [PMID: 26004002 DOI: 10.1016/j.ijpharm.2015.05.049] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 04/28/2015] [Accepted: 05/17/2015] [Indexed: 10/23/2022]
Abstract
Liquid crystal (LC) technology has attracted much interest for new injectable sustained-release (SR) formulations. In this study, an injectable liquid crystal-forming system (LCFS) including entecavir was prepared for the treatment of hepatitis B. In particular, an anchoring effect was introduced because LCFSs are relatively hydrophobic while entecavir is a slightly charged drug. The physicochemical properties of LCFSs were investigated by cryo-transmission electron microscopy (cryo-TEM), polarized optical microscopy, and small-angle X-ray scattering (SAXS), showing typical characteristics of the liquid crystalline phase, which was classified as the hexagonal phase. A pharmacokinetic study in rats showed sustained release of entecavir for 3-5 days with a basic LCFS formulation composed of sorbitan monooleate (SMO), phosphatidyl choline (PC), and tocopherol acetate (TA) as the main LC components. 1,2-Dipalmitoyl-sn-glycero-3-phosphatidic acid (DPPA), an anionic phospholipid, was added to increase the anchoring effect between the cationic entecavir and the anionic DPPA, which resulted in a 1.5-times increase in half-life in rats. In addition, anchoring was strengthened by optimizing the pH to 2.5-4.5, increasing the half-life in the rat and dog. Also, due to the increasing terminal half-life from rat to dog resulting from species differences, LCFS produced one week delivery of entecavir in rat and two weeks delivery in dog. Therefore, LCFS injection using the anchoring effect for entecavir can potentially be used to deliver the drug over more than 2 weeks or even 1 month for the treatment of hepatitis B.
Collapse
|
13
|
Derde M, Nau F, Guérin-Dubiard C, Lechevalier V, Paboeuf G, Jan S, Baron F, Gautier M, Vié V. Native and dry-heated lysozyme interactions with membrane lipid monolayers: Lipid packing modifications of a phospholipid mixture, model of the Escherichia coli cytoplasmic membrane. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:1065-73. [PMID: 25615689 DOI: 10.1016/j.bbamem.2015.01.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 01/05/2015] [Accepted: 01/11/2015] [Indexed: 11/17/2022]
Abstract
Antimicrobial resistance is currently an important public health issue. The need for innovative antimicrobials is therefore growing. The ideal antimicrobial compound should limit antimicrobial resistance. Antimicrobial peptides or proteins such as hen egg white lysozyme are promising molecules that act on bacterial membranes. Hen egg white lysozyme has recently been identified as active on Gram-negative bacteria due to disruption of the outer and cytoplasmic membrane integrity. Furthermore, dry-heating (7 days and 80 °C) improves the membrane activity of lysozyme, resulting in higher antimicrobial activity. These in vivo findings suggest interactions between lysozyme and membrane lipids. This is consistent with the findings of several other authors who have shown lysozyme interaction with bacterial phospholipids such as phosphatidylglycerol and cardiolipin. However, until now, the interaction between lysozyme and bacterial cytoplasmic phospholipids has been in need of clarification. This study proposes the use of monolayer models with a realistic bacterial phospholipid composition in physiological conditions. The lysozyme/phospholipid interactions have been studied by surface pressure measurements, ellipsometry and atomic force microscopy. Native lysozyme has proved able to absorb and insert into a bacterial phospholipid monolayer, resulting in lipid packing reorganization, which in turn has lead to lateral cohesion modifications between phospholipids. Dry-heating of lysozyme has increased insertion capacity and ability to induce lipid packing modifications. These in vitro findings are then consistent with the increased membrane disruption potential of dry heated lysozyme in vivo compared to native lysozyme. Moreover, an eggPC monolayer study suggested that lysozyme/phospholipid interactions are specific to bacterial cytoplasmic membranes.
Collapse
Affiliation(s)
- Melanie Derde
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France.
| | - Françoise Nau
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Catherine Guérin-Dubiard
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Valérie Lechevalier
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Gilles Paboeuf
- Université de Rennes 1, Institut de physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
| | - Sophie Jan
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Florence Baron
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Michel Gautier
- Agrocampus Ouest, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France; INRA, UMR1253 Science et technologie du lait et de l'œuf, F-35042 Rennes, France
| | - Véronique Vié
- Université de Rennes 1, Institut de physique de Rennes, UMR6251, CNRS, F-35042 Rennes, France
| |
Collapse
|
14
|
Zhang G, Keiderling TA. Equilibrium and dynamic spectroscopic studies of the interaction of monomeric β-lactoglobulin with lipid vesicles at low pH. Biochemistry 2014; 53:3079-87. [PMID: 24773452 DOI: 10.1021/bi500027x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
β-Lactoglobulin (βLG) is a member of the lipocalin protein family that changes structure upon interacting with anionic surfactants and lipid vesicles under higher-pH conditions at which βLG is dimeric. In this study, a β-sheet to α-helix transformation was also observed for monomeric βLG obtained at pH 2.6 when it was mixed with small unilamellar vesicles (SUVs) of zwitterionic lipids, but being mixed with anionic lipids produced little change. The dynamics and extent of this change were quite dependent on the lipid character, phase, and vesicle size. With 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), at ~50 °C and pH 2.6, the βLG converted to a substantially helical form upon addition of ~10 mM lipid in a two-step kinetic process having time constants of ~1 and ~25 h, as monitored by circular dichroism (CD). Fluorescence changes were simpler but implied a rapid initial change in the Trp environments followed by a slower process paralleling the change in secondary structure. Polarization attenuated total reflectance Fourier transform infrared results indicate the formed helices are at least partially inserted into the lipid bilayer and the sheet segments are on the surface. Thermal behavior showed that the secondary structure of the lipid-bound βLG had two phases, the first being characteristic of the protein-lipid vesicle interaction and the second following the DSPC phase change after which the protein apparently dissociated from the vesicle. Large unilamellar vesicles had a weaker interaction, as judged by CD, which may correlate to the partial exposure of the hydrophobic parts of the SUV bilayer. Other zwitterionic lipids bound βLG with much slower kinetics and often required sonication to induce interaction, but these also showed dissociation upon lipid phase change. These thermal and kinetic behaviors suggest a mechanism for the interaction of monomeric βLG with zwitterionic lipids different from that seen previously for the dimeric form.
Collapse
Affiliation(s)
- Ge Zhang
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street (m/c 111), Chicago, Illinois 60607-7061, United States
| | | |
Collapse
|
15
|
Onaizi SA, Nasser MS, Twaiq F. Lysozyme binding to tethered bilayer lipid membranes prepared by rapid solvent exchange and vesicle fusion methods. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2014; 43:191-8. [DOI: 10.1007/s00249-014-0955-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/07/2014] [Accepted: 03/13/2014] [Indexed: 11/30/2022]
|
16
|
Melo AM, Loura LMS, Fernandes F, Villalaín J, Prieto M, Coutinho A. Electrostatically driven lipid-lysozyme mixed fibers display a multilamellar structure without amyloid features. SOFT MATTER 2014; 10:840-850. [PMID: 24651998 DOI: 10.1039/c3sm52586d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Understanding the interactions between anionic lipid membranes and amyloidogenic proteins/peptides is key to elucidate the molecular mechanisms underlying the membrane-driven amyloid fiber formation. Here, hen egg-white lysozyme was used as a model protein to test whether this same process also occurs with non-amyloidogenic lipid-binding proteins/peptides. A complementary set of biophysical techniques was employed to study the structure and dynamics of the lipid-lysozyme mixed fibers produced at a low lipid/protein molar ratio that have been proposed earlier to present "amyloid-like" characteristics. The multilamellar architecture of these elongated mesoscopic structures was established by performing time-resolved Förster resonance energy transfer measurements, at both bulk (ensemble) and single-fiber level. The predominantly oligomeric lysozyme and phospholipids were both found to display significantly decreased lateral mobility when embedded in these mixed fibers. Notably, two-photon microscopy of Laurdan revealed that a pronounced membrane surface dehydration/increased molecular interfacial packing was produced exclusively in these elongated mixed supramolecular fibers present in the highly polymorphic samples. Infrared spectroscopic studies of lysozyme in these samples further showed that this protein did not exhibit a rich β-sheet structure characteristic of amyloid fibrils. These results support the conclusion that negatively charged lipid membranes do not have the general ability to trigger amyloid fibril formation of non-amyloidogenic proteins.
Collapse
Affiliation(s)
- Ana M Melo
- Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | | | | | | | | | | |
Collapse
|
17
|
Das A, Thakur R, Dagar A, Chakraborty A. A spectroscopic investigation and molecular docking study on the interaction of hen egg white lysozyme with liposomes of saturated and unsaturated phosphocholines probed by an anticancer drug ellipticine. Phys Chem Chem Phys 2014; 16:5368-81. [DOI: 10.1039/c3cp54247e] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
18
|
Melo AM, Ricardo JC, Fedorov A, Prieto M, Coutinho A. Fluorescence Detection of Lipid-Induced Oligomeric Intermediates Involved in Lysozyme “Amyloid-Like” Fiber Formation Driven by Anionic Membranes. J Phys Chem B 2013; 117:2906-17. [DOI: 10.1021/jp310396v] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ana M. Melo
- Centro de Química-Física
Molecular and Institute of Nanoscience and Nanotechnology, I.S.T, Universidade Técnica de Lisboa, Av. Rovisco
Pais, 1049-001 Lisboa, Portugal
| | - Joana C. Ricardo
- Centro de Química-Física
Molecular and Institute of Nanoscience and Nanotechnology, I.S.T, Universidade Técnica de Lisboa, Av. Rovisco
Pais, 1049-001 Lisboa, Portugal
| | - Aleksander Fedorov
- Centro de Química-Física
Molecular and Institute of Nanoscience and Nanotechnology, I.S.T, Universidade Técnica de Lisboa, Av. Rovisco
Pais, 1049-001 Lisboa, Portugal
| | - Manuel Prieto
- Centro de Química-Física
Molecular and Institute of Nanoscience and Nanotechnology, I.S.T, Universidade Técnica de Lisboa, Av. Rovisco
Pais, 1049-001 Lisboa, Portugal
| | - Ana Coutinho
- Centro de Química-Física
Molecular and Institute of Nanoscience and Nanotechnology, I.S.T, Universidade Técnica de Lisboa, Av. Rovisco
Pais, 1049-001 Lisboa, Portugal
- Dep. Química e Bioquímica, FCUL, Campo Grande, 1749-016 Lisboa, Portugal
| |
Collapse
|
19
|
Luo JJ, Wu FG, Qin SS, Yu ZW. In Situ Unfolded Lysozyme Induces the Lipid Lateral Redistribution of a Mixed Lipid Model Membrane. J Phys Chem B 2012; 116:12381-8. [DOI: 10.1021/jp304339t] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jun-Jie Luo
- Key Laboratory of Bioorganic Phosphorous
Chemistry
and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic
of China
| | - Fu-Gen Wu
- Key Laboratory of Bioorganic Phosphorous
Chemistry
and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic
of China
| | - Shan-Shan Qin
- Key Laboratory of Bioorganic Phosphorous
Chemistry
and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic
of China
| | - Zhi-Wu Yu
- Key Laboratory of Bioorganic Phosphorous
Chemistry
and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic
of China
| |
Collapse
|
20
|
Witoonsaridsilp W, Panyarachun B, Jaturanpinyo M, Sarisuta N. Phospholipid vesicle-bound lysozyme to enhance permeability in human intestinal cells. Pharm Dev Technol 2012; 18:821-7. [PMID: 22762545 DOI: 10.3109/10837450.2012.700930] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Oral peptide and protein drug delivery still remain the area of challenges for pharmaceutical scientists due to their low stability and permeability in gastrointestinal (GI) tract. In this study phospholipid vesicle-bound lysozyme were prepared and assessed for their physicochemical properties, secondary structure, and permeation across Caco-2 cells. RESULTS Lysozyme was found to be substantially bound onto negatively charged vesicles via electrostatic interaction as evidenced by zeta potential measurements regardless of cholesterol content. In contrast, the size of phospholipid vesicle-bound lysozyme became larger with the increasing cholesterol content. The secondary structure of vesicle-bound lysozyme examined by FTIR was unchanged compared to that in buffer solution. The apparent permeability of vesicle-bound lysozyme across Caco-2 cells monolayer was significantly enhanced with a size dependent manner compared to that of solution. CONCLUSION The permeation across Caco-2 cell monolayers of phospholipid vesicle-bound lysozyme was demonstrated to be significantly enhanced with a size-dependent manner.
Collapse
Affiliation(s)
- Wasu Witoonsaridsilp
- Department of Manufacturing Pharmacy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand
| | | | | | | |
Collapse
|
21
|
Bhattacharjee S, Dong J, Ma Y, Hovde S, Geiger JH, Baker GL, Bruening ML. Formation of high-capacity protein-adsorbing membranes through simple adsorption of poly(acrylic acid)-containing films at low pH. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6885-92. [PMID: 22468687 PMCID: PMC3361728 DOI: 10.1021/la300481e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Layer-by-layer polyelectrolyte adsorption is a simple, convenient method for introducing ion-exchange sites in porous membranes. This study demonstrates that adsorption of poly(acrylic acid) (PAA)-containing films at pH 3 rather than pH 5 increases the protein-binding capacity of such polyelectrolyte-modified membranes 3-6-fold. The low adsorption pH generates a high density of -COOH groups that function as either ion-exchange sites or points for covalent immobilization of metal-ion complexes that selectively bind tagged proteins. When functionalized with nitrilotriacetate (NTA)-Ni(2+) complexes, membranes containing PAA/polyethylenimine (PEI)/PAA films bind 93 mg of histidine(6)-tagged (His-tagged) ubiquitin per cm(3) of membrane. Additionally these membranes isolate His-tagged COP9 signalosome complex subunit 8 from cell extracts and show >90% recovery of His-tagged ubiquitin. Although modification with polyelectrolyte films occurs by simply passing polyelectrolyte solutions through the membrane for as little as 5 min, with low-pH deposition the protein binding capacities of such membranes are as high as for membranes modified with polymer brushes and 2-3-fold higher than for commercially available immobilized metal affinity chromatography (IMAC) resins. Moreover, the buffer permeabilities of polyelectrolyte-modified membranes that bind His-tagged protein are ~30% of the corresponding permeabilities of unmodified membranes, so protein capture can occur rapidly with low-pressure drops. Even at a solution linear velocity of 570 cm/h, membranes modified with PAA/PEI/PAA exhibit a lysozyme dynamic binding capacity (capacity at 10% breakthrough) of ~40 mg/cm(3). Preliminary studies suggest that these membranes are stable under depyrogenation conditions (1 M NaOH).
Collapse
Affiliation(s)
- Somnath Bhattacharjee
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Jinlan Dong
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Yiding Ma
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Stacy Hovde
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - James H Geiger
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Gregory L. Baker
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Merlin L. Bruening
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| |
Collapse
|
22
|
Wang X, Huang X, Xin Y, Du X. Myoglobin-directed assemblies of binary monolayers functionalized with iminodiacetic acid ligands at the air-water interface through metal coordination for multivalent protein binding. Phys Chem Chem Phys 2012; 14:5470-8. [PMID: 22415292 DOI: 10.1039/c2cp40104e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Myoglobin binding to the binary monolayers composed of sodium hexadecylimino diacetate and hexadecanol at the air-water interface by means of metal coordination has been investigated using infrared reflection absorption spectroscopy (IRRAS). In the absence of Cu(2+), no myoglobin binding to the binary monolayers was observed. In the presence of Cu(2+), remarkable myoglobin binding to the binary monolayers resulted from the formation of ternary complexes of iminodiacetate (IDA)-Cu(2+)-surface histidine. Myoglobin-directed assemblies of the binary monolayers facilitated multivalent protein binding through lateral rearrangements of the IDA ligands and reorientations of the alkyl chains for enhanced protein binding. Myoglobin binding to and desorption from the binary monolayers could be readily controlled through metal coordination.
Collapse
Affiliation(s)
- Xiaoyu Wang
- Key Laboratory of Mesoscopic Chemistry (Ministry of Education), and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | | | | | | |
Collapse
|
23
|
Modulation of physiological and pathological activities of lysozyme by biological membranes. Cell Mol Biol Lett 2012; 17:349-75. [PMID: 22544762 PMCID: PMC6275811 DOI: 10.2478/s11658-012-0015-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Accepted: 04/18/2012] [Indexed: 11/21/2022] Open
Abstract
The molecular details of interactions between lipid membranes and lysozyme (Lz), a small polycationic protein with a wide range of biological activities, have long been the focus of numerous studies. The biological consequences of this process are considered to embrace at least two aspects: i) correlation between antimicrobial and membranotropic properties of this protein, and ii) lipid-mediated Lz amyloidogenesis. The mechanisms underlying the lipid-assisted protein fibrillogenesis and membrane disruption exerted by Lz in bacterial cells are believed to be similar. The present investigation was undertaken to gain further insight into Lz-lipid interactions and explore the routes by which Lz exerts its antimicrobial and amyloidogenic actions. Binding and Förster resonance energy transfer studies revealed that upon increasing the content of anionic lipids in lipid vesicles, Lz forms aggregates in a membrane environment. Total internal reflection fluorescence microscopy and pyrene excimerization reaction were employed to study the effect of Lz on the structural and dynamic properties of lipid bilayers. It was found that Lz induces lipid demixing and reduction of bilayer free volume, the magnitude of this effect being much more pronounced for oligomeric protein.
Collapse
|
24
|
Wang K, Zhou C, Hong Y, Zhang X. A review of protein adsorption on bioceramics. Interface Focus 2012; 2:259-77. [PMID: 23741605 DOI: 10.1098/rsfs.2012.0012] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 02/28/2012] [Indexed: 11/12/2022] Open
Abstract
Bioceramics, because of its excellent biocompatible and mechanical properties, has always been considered as the most promising materials for hard tissue repair. It is well know that an appropriate cellular response to bioceramics surfaces is essential for tissue regeneration and integration. As the in vivo implants, the implanted bioceramics are immediately coated with proteins from blood and body fluids, and it is through this coated layer that cells sense and respond to foreign implants. Hence, the adsorption of proteins is critical within the sequence of biological activities. However, the biological mechanisms of the interactions of bioceramics and proteins are still not well understood. In this review, we will recapitulate the recent studies on the bioceramic-protein interactions.
Collapse
Affiliation(s)
- Kefeng Wang
- National Engineering Research Center for Biomaterials , Sichuan University , 610064 Chengdu , People's Republic of China
| | | | | | | |
Collapse
|
25
|
Hirano A, Yoshikawa H, Matsushita S, Yamada Y, Shiraki K. Adsorption and disruption of lipid bilayers by nanoscale protein aggregates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3887-3895. [PMID: 22276744 DOI: 10.1021/la204717c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nanoparticles taken into biological systems can have biological impacts through their interactions with cell membranes, accompanied by protein adsorption onto the nanoparticle surfaces, forming a so-called protein corona. Our current research aims to demonstrate that nanoscale protein aggregates behave like such nanoparticles with regard to the interaction with lipid membranes. In this study, the adsorption and disruption of the lipid membranes by protein aggregates were investigated using amyloid fibrils and nanoscale thermal aggregates of lysozyme. Both types of protein aggregates had disruptive effects on the negatively charged liposomes, similar to polycationic nanoparticles. Interestingly, adsorption of liposomes on the amyloid fibrils preceding disruption occurred even if the net charge of the liposome was zero, suggesting the importance of hydrophobic interactions in addition to electrostatic interactions. The results of the present study provide new insights into the biological impacts of nanoparticles in vivo.
Collapse
Affiliation(s)
- Atsushi Hirano
- Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8562, Japan
| | | | | | | | | |
Collapse
|
26
|
Melo AM, Prieto M, Coutinho A. The effect of variable liposome brightness on quantifying lipid–protein interactions using fluorescence correlation spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1808:2559-68. [DOI: 10.1016/j.bbamem.2011.06.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 06/01/2011] [Accepted: 06/01/2011] [Indexed: 11/17/2022]
|
27
|
Wells RC, Hill RB. The cytosolic domain of Fis1 binds and reversibly clusters lipid vesicles. PLoS One 2011; 6:e21384. [PMID: 21738650 PMCID: PMC3125187 DOI: 10.1371/journal.pone.0021384] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Accepted: 05/27/2011] [Indexed: 11/18/2022] Open
Abstract
Every lipid membrane fission event involves the association of two apposing bilayers, mediated by proteins that can promote membrane curvature, fusion and fission. We tested the hypothesis that Fis1, a tail-anchored protein involved in mitochondrial and peroxisomal fission, promotes changes in membrane structure. We found that the cytosolic domain of Fis1 alone binds lipid vesicles, which is enhanced upon protonation and increasing concentrations of anionic phospholipids. Fluorescence and circular dichroism data indicate that the cytosolic domain undergoes a membrane-induced conformational change that buries two tryptophan side chains upon membrane binding. Light scattering and electron microscopy data show that membrane binding promotes lipid vesicle clustering. Remarkably, this vesicle clustering is reversible and vesicles largely retain their original shape and size. This raises the possibility that the Fis1 cytosolic domain might act in membrane fission by promoting a reversible membrane association, a necessary step in membrane fission.
Collapse
Affiliation(s)
- Robert C. Wells
- Department of Biology, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - R. Blake Hill
- Department of Biology, Johns Hopkins University, Baltimore, Maryland, United States of America
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland, United States of America
- * E-mail:
| |
Collapse
|
28
|
Gorbenko G, Trusova V. Effects of oligomeric lysozyme on structural state of model membranes. Biophys Chem 2011; 154:73-81. [DOI: 10.1016/j.bpc.2011.01.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 01/12/2011] [Accepted: 01/14/2011] [Indexed: 12/01/2022]
|
29
|
Islam MS, Kouzani AZ. Design of a high sensitive double-gate field-effect transistor biosensor for DNA detection. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2011; 2011:4788-4791. [PMID: 22255409 DOI: 10.1109/iembs.2011.6091186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The study of interactions between organic biomolecules and semiconducting surfaces is an important consideration for the design and fabrication of field-effect-transistor (FET) biosensor. This paper demonstrates DNA detection by employing a double-gate field effect transistor (DGFET). In addition, an investigation of sensitivity and signal to noise ratio (SNR) is carried out for different values of analyte concentration, buffer ion concentration, pH, reaction constant, etc. Sensitivity, which is indicated by the change of drain current, increases non-linearly after a specific value (~ 1 nM) of analyte concentration and decreases non-linearly with buffer ion concentration. However, sensitivity is linearly related to the fluidic gate voltage. The drain current has a significant effect on the positive surface group (-NH(2)) compared to the negative counterpart (-OH). Furthermore, the sensor has the same response at a particular value of pH (5.76) irrespective of the density of surface group, although it decreases with pH value. The signal to noise ratio is improved with higher analyte concentrations and receptor densities.
Collapse
Affiliation(s)
- Md Saiful Islam
- School of Engineering, Deakin University, Geelong, Victoria 3217, Australia.
| | | |
Collapse
|
30
|
Liu G, Dotzauer DM, Bruening ML. Ion-Exchange Membranes Prepared Using Layer-by-Layer Polyelectrolyte Deposition. J Memb Sci 2010; 354:198-205. [PMID: 20606722 PMCID: PMC2894478 DOI: 10.1016/j.memsci.2010.02.047] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Layer-by-layer polyelectrolyte adsorption in porous polymeric membranes provides a simple way to create ion-exchange sites without greatly decreasing hydraulic permeability (<20% reduction in permeability). At 80% breakthrough, membranes coated with 3-bilayer poly(styrene sulfonate) (PSS)/polyethyleneimine (PEI) films bind 37±6 mg of negatively charged Au colloids per mL of membrane volume. The binding capacity of membranes coated with 1-bilayer films decreases in the order PSS/PEI>PSS/poly(diallyldimethyl ammonium chloride)>PSS/poly(allylamine hydrochloride). Films terminated with a polyanion present cation-exchange sites that bind lysozyme, and the lysozyme-binding capacities of (PSS/PEI)(3)/PSS films increase with the ionic strength of the solution from which the last PSS layer is deposited. Charge screening during deposition of the terminal PSS layer gives rise to a larger number of ion-exchange sites and lysozyme binding capacities as high as 16 mg per mL of membrane. At 10% breakthrough, a stack of 3 membranes binds 3 times as much lysozyme as a single membrane, showing that stacking is an effective way to increase capacity.
Collapse
Affiliation(s)
- Guanqing Liu
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824
| | - David M. Dotzauer
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824
| | - Merlin L Bruening
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824
| |
Collapse
|
31
|
Gorbenko GP. Fluorescence Spectroscopy of Protein Oligomerization in Membranes. J Fluoresc 2010; 21:945-51. [DOI: 10.1007/s10895-010-0649-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2009] [Accepted: 03/23/2010] [Indexed: 12/25/2022]
|
32
|
Witoonsaridsilp W, Panyarachun B, Sarisuta N, Müller-Goymann CC. Influence of microenvironment and liposomal formulation on secondary structure and bilayer interaction of lysozyme. Colloids Surf B Biointerfaces 2010; 75:501-9. [DOI: 10.1016/j.colsurfb.2009.09.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Revised: 09/04/2009] [Accepted: 09/22/2009] [Indexed: 10/20/2022]
|
33
|
Comparative analysis of the electrostatics of the binding of cationic proteins to vesicles: Asymmetric location of anionic phospholipids. Anal Chim Acta 2009; 654:2-10. [DOI: 10.1016/j.aca.2009.08.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Revised: 06/24/2009] [Accepted: 08/14/2009] [Indexed: 11/23/2022]
|
34
|
Tirosh B, Khatib N, Barenholz Y, Nissan A, Rubinstein A. Transferrin as a Luminal Target for Negatively Charged Liposomes in the Inflamed Colonic Mucosa. Mol Pharm 2009; 6:1083-91. [DOI: 10.1021/mp9000926] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Boaz Tirosh
- Department of Pharmacology and Experimental Therapeutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Department of Pharmaceutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Laboratory of Membrane and Liposome Research, The Hebrew University—Hadassah Medical School, Jerusalem, Israel, and Department of Surgery, Hadassah—Hebrew University Medical Center,
| | - Nadine Khatib
- Department of Pharmacology and Experimental Therapeutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Department of Pharmaceutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Laboratory of Membrane and Liposome Research, The Hebrew University—Hadassah Medical School, Jerusalem, Israel, and Department of Surgery, Hadassah—Hebrew University Medical Center,
| | - Yechezkel Barenholz
- Department of Pharmacology and Experimental Therapeutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Department of Pharmaceutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Laboratory of Membrane and Liposome Research, The Hebrew University—Hadassah Medical School, Jerusalem, Israel, and Department of Surgery, Hadassah—Hebrew University Medical Center,
| | - Aviram Nissan
- Department of Pharmacology and Experimental Therapeutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Department of Pharmaceutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Laboratory of Membrane and Liposome Research, The Hebrew University—Hadassah Medical School, Jerusalem, Israel, and Department of Surgery, Hadassah—Hebrew University Medical Center,
| | - Abraham Rubinstein
- Department of Pharmacology and Experimental Therapeutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Department of Pharmaceutics, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel, Laboratory of Membrane and Liposome Research, The Hebrew University—Hadassah Medical School, Jerusalem, Israel, and Department of Surgery, Hadassah—Hebrew University Medical Center,
| |
Collapse
|
35
|
Torrens F, Castellano G, Campos A, Abad C. Binding of water-soluble, globular proteins to anionic model membranes. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2008.12.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
36
|
Chaudhary N, Nagaraj R. Hen lysozyme amyloid fibrils induce aggregation of erythrocytes and lipid vesicles. Mol Cell Biochem 2009; 328:209-15. [DOI: 10.1007/s11010-009-0091-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2008] [Accepted: 03/11/2009] [Indexed: 11/30/2022]
|
37
|
|
38
|
Bergers JJ, Bloois LV, Barenholz Y, Crommelin DJ. Conformational Changes of Myoglobin Upon Interaction with Negatively-Charged Phospholipid Vesicles. J Liposome Res 2008. [DOI: 10.3109/08982109509018632] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
39
|
Harbers GM, Emoto K, Greef C, Metzger SW, Woodward HN, Mascali JJ, Grainger DW, Lochhead MJ. A functionalized poly(ethylene glycol)-based bioassay surface chemistry that facilitates bio-immobilization and inhibits non-specific protein, bacterial, and mammalian cell adhesion. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2008; 19:4405-4414. [PMID: 18815622 PMCID: PMC2546567 DOI: 10.1021/cm070509u] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
This paper describes a new bioassay surface chemistry that effectively inhibits non-specific biomolecular and cell binding interactions, while providing a capacity for specific immobilization of desired biomolecules. Poly(ethylene glycol) (PEG) as the primary component in nonfouling film chemistry is well-established, but the multicomponent formulation described here is unique in that it (1) is applied in a single, reproducible, solution-based coating step; (2) can be applied to diverse substrate materials without the use of special primers; and (3) is readily functionalized to provide specific attachment chemistries. Surface analysis data are presented, detailing surface roughness, polymer film thickness, and film chemistry. Protein non-specific binding assays demonstrate significant inhibition of serum, fibrinogen, and lysozyme adsorption to coated glass, indium tin oxide, and tissue culture polystyrene dishes. Inhibition of S. aureus and K. pneumoniae microbial adhesion in a microfluidic flow cell, and inhibition of fibroblast cell adhesion from serum-based cell culture is shown. Effective functionalization of the coating is demonstrated by directing fibroblast adhesion to polymer surfaces activated with an RGD peptide. Batch-to-batch reproducibility data are included. The in situ cross-linked PEG-based coating chemistry is unique in its formulation, and its surface properties are attractive for a broad range of in vitro bioassay applications.
Collapse
Affiliation(s)
- Gregory M. Harbers
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523-1872 USA
| | - Kazunori Emoto
- Accelr8 Technology Corporation, 7000 N. Broadway, Suite 3-307, Denver, CO 80221 USA
| | - Charles Greef
- Accelr8 Technology Corporation, 7000 N. Broadway, Suite 3-307, Denver, CO 80221 USA
| | - Steven W. Metzger
- Accelr8 Technology Corporation, 7000 N. Broadway, Suite 3-307, Denver, CO 80221 USA
| | - Heather N. Woodward
- Accelr8 Technology Corporation, 7000 N. Broadway, Suite 3-307, Denver, CO 80221 USA
| | - James J. Mascali
- Accelr8 Technology Corporation, 7000 N. Broadway, Suite 3-307, Denver, CO 80221 USA
| | - David W. Grainger
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523-1872 USA
| | - Michael J. Lochhead
- Accelr8 Technology Corporation, 7000 N. Broadway, Suite 3-307, Denver, CO 80221 USA
| |
Collapse
|
40
|
Pinched multilamellar structure of aggregates of lysozyme and phosphatidylserine-containing membranes revealed by FRET. Biophys J 2008; 95:4726-36. [PMID: 18658231 DOI: 10.1529/biophysj.108.134379] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Electrostatic interactions between negatively charged membranes and basic peptides/protein domains have been implicated as the driving force for several important processes, often involving membrane aggregation, fusion, or phase separation. Recently, acidic lipids were reported to both catalyze amyloid fiber formation by amyloidogenic proteins/peptides and induce formation of "amyloid-like" fibrils by nonamyloidogenic proteins. This study aims to characterize the structure of the aggregates of a basic protein (lysozyme) and negatively charged membranes (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine/1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoserine 4:1 mixture) at the molecular level, using Förster resonance energy transfer. It is concluded that lysozyme induced formation of a "pinched lamellar" structure, with reduced interbilayer distance in the regions where there is bound protein and increased interbilayer distance (stabilized by hydration repulsion) outside these areas.
Collapse
|
41
|
Gorbenko GP, Ioffe VM, Molotkovsky JG, Kinnunen PK. Resonance energy transfer study of lysozyme–lipid interactions. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:1213-21. [DOI: 10.1016/j.bbamem.2007.09.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2007] [Revised: 09/06/2007] [Accepted: 09/17/2007] [Indexed: 11/24/2022]
|
42
|
Torrens F, Castellano G. Improvement of charge-transfer indices for multifunctional amino acids: application to lysozyme. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2008; 19:643-654. [PMID: 19061081 DOI: 10.1080/10629360802551000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Valence topological Charge-Transfer (CT) indices are applied to the calculation of pH at the isoelectric point (pI). The model is generalized for molecules with heteroatoms. The ability of the indices for the description of molecular charge distribution is established by comparing them with the pI of 21 amino acids. Linear correlation models are obtained. The CT indices improve multivariable regression equations for pI. The variance decreases by 95%. No superimposition of the corresponding G(k)-J(k) and G(k)(V)-J(k)(V) pairs is observed in most fits, which diminishes the risk of collinearity. The inclusion of heteroatoms in pi-electron system is beneficial for the description of pI, the because of either the role of the additional p orbitals provided by heteroatom or the role of steric factors in pi-electron conjugation. The use of CT/valence CT indices {G(k), J(k), G(k)(V), J(k)(V)} gives limited results for modelling amino acid pI. The inclusion of the number of acidic/basic groups improves the models. The effect is specially noticeable for amino acids with more than two functional groups. The fitting line for 21 amino acids is used to estimate lysozyme pI replacing (1 + Delta n/n(T)) with (M + Delta n)/n(T). The results for lysozyme fragments can estimate the pI of the whole protein with 1-13% error.
Collapse
Affiliation(s)
- F Torrens
- Institut Universitari de Ciència Molecular, Universitat de València, València, Spain.
| | | |
Collapse
|
43
|
Tantipolphan R, Rades T, McQuillan AJ, Medlicott NJ. Adsorption of bovine serum albumin (BSA) onto lecithin studied by attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. Int J Pharm 2007; 337:40-7. [PMID: 17240095 DOI: 10.1016/j.ijpharm.2006.12.021] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2006] [Revised: 12/18/2006] [Accepted: 12/18/2006] [Indexed: 11/29/2022]
Abstract
The adsorption of bovine serum albumin (BSA) to lecithin was investigated by ATR-FTIR spectroscopy. Lecithin films were prepared by casting aliquots of 3.2 microg lecithin in methanol onto ZnSe ATR prisms. Surface morphology and the thickness of the films were investigated by laser scanning confocal electron microscopy and scanning electron microscopy and the thickness of the films used for adsorption studies was estimated to be 40 A. The dependency of the CO peak area on the lecithin mass in the calibration curve confirms that the thickness of the film is below the penetration depth of the infrared evanescent wave. Size exclusion HPLC and fluorescence spectroscopy show that BSA conformation in up to 1M NaCl and CaCl(2) solutions is similar to that in water with no aggregation or changes in protein conformation seen over 4h. The kinetics of BSA adsorption on the lecithin film from water, NaCl and CaCl(2) solutions demonstrates that ions promote the protein adsorption. BSA bound more in the presence of NaCl compared to CaCl(2) at equivalent concentrations. The adsorption appeared greatest at a 0.1M concentration for both NaCl and CaCl(2). The results are explained in terms of absorptive reactivity of BSA and lecithin surfaces upon salt addition.
Collapse
MESH Headings
- Adsorption
- Animals
- Calcium Chloride/chemistry
- Cattle
- Chemistry, Pharmaceutical
- Chromatography, Gel/methods
- Chromatography, High Pressure Liquid
- Excipients/chemistry
- Kinetics
- Methanol/chemistry
- Microscopy, Confocal
- Microscopy, Electron, Scanning
- Phosphatidylcholines/chemistry
- Phosphatidylcholines/metabolism
- Protein Binding
- Protein Conformation
- Selenium Compounds/chemistry
- Serum Albumin, Bovine/chemistry
- Serum Albumin, Bovine/metabolism
- Sodium Chloride/chemistry
- Spectrometry, Fluorescence
- Spectroscopy, Fourier Transform Infrared
- Surface Properties
- Technology, Pharmaceutical/methods
- Water/chemistry
- Zinc Compounds/chemistry
Collapse
Affiliation(s)
- R Tantipolphan
- School of Pharmacy, The University of Otago, Dunedin, New Zealand
| | | | | | | |
Collapse
|
44
|
Gorbenko GP, Ioffe VM, Kinnunen PKJ. Binding of lysozyme to phospholipid bilayers: evidence for protein aggregation upon membrane association. Biophys J 2007; 93:140-53. [PMID: 17434939 PMCID: PMC1914450 DOI: 10.1529/biophysj.106.102749] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Biological functions of lysozyme, including its antimicrobial, antitumor, and immune-modulatory activities have been suggested to be largely determined by the lipid binding properties of this protein. To gain further insight into these interactions on a molecular level the association of lysozyme to liposomes composed of either 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine or its mixtures with 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-rac-glycerol, 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-rac-phosphatidylserine, or bovine heart cardiolipin was studied by a combination of fluorescence techniques. The characteristics of the adsorption of lysozyme to lipid bilayers were investigated using fluorescein 5'-isothiocyanate labeled protein, responding to membrane association by a decrease in fluorescence. Upon increasing the content of anionic phospholipids in lipid vesicles, the binding isotherms changed from Langmuir-like to sigmoidal. Using adsorption models based on scaled particle and double-layer theories, this finding was rationalized in terms of self-association of the membrane-bound protein. The extent of quenching of lysozyme tryptophan fluorescence by acrylamide decreased upon membrane binding, revealing a conformational transition for the protein upon its surface association, resulting in a diminished access of the fluorophore to the aqueous phase. Steady-state fluorescence anisotropy of bilayer-incorporated probe 1,6-diphenyl-1,3,5-hexatriene was measured at varying lipid-to-protein molar ratios. Lysozyme was found to increase acyl-chain order for liposomes with the content of acidic phospholipid exceeding 10 mol %. Both electrostatic and hydrophobic protein-lipid interactions can be concluded to modulate the aggregation behavior of lysozyme when bound to lipid bilayers. Modulation of lysozyme aggregation propensity by membrane binding may have important implications for protein fibrillogenesis in vivo. Disruption of membrane integrity by the aggregated protein species is likely to be the mechanism responsible for the cytotoxicity of lysozyme.
Collapse
Affiliation(s)
- Galyna P Gorbenko
- Department of Biological and Medical Physics, V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
| | | | | |
Collapse
|
45
|
Macakova L, Nordstierna L, Karlsson G, Blomberg E, Furó I. Lack of association between a cationic protein and a cationic fluorosurfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:771-5. [PMID: 17209632 DOI: 10.1021/la062469z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Surface tension, 19F and 1H NMR spectroscopy, and cryotransmission electron microscopy are used to characterize the state of association in aqueous solutions of a fluorosurfactant CF3(CF2)nSO2NH(CH2)3-4N(CH3)3+ I- (n = 8, 6) with and without lysozyme added. In the absence of lysozyme, we find monomers, small aggregates, and large vesicles to coexist, with the individual fluorosurfactant molecules exchanging slowly (>1 ms) among those states. When both lysozyme and fluorosurfactant are present in the solution, they have no measurable influence on the physical state of the other. In contrast, a hydrogenated cationic surfactant with the same headgroup, hexadecyltrimethylammonium bromide, is shown to associate to lysozyme.
Collapse
Affiliation(s)
- Lubica Macakova
- Division of Surface Chemistry, Royal Institute of Technology, S-10044 Stockholm, Sweden
| | | | | | | | | |
Collapse
|
46
|
Thongraung C, Benjakul S, Hultin HO. Effect of pH, ADP and muscle soluble components on cod hemoglobin characteristics and extractability. Food Chem 2006. [DOI: 10.1016/j.foodchem.2005.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
47
|
Zschörnig O, Paasche G, Thieme C, Korb N, Arnold K. Modulation of lysozyme charge influences interaction with phospholipid vesicles. Colloids Surf B Biointerfaces 2005; 42:69-78. [PMID: 15784328 DOI: 10.1016/j.colsurfb.2005.01.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2005] [Indexed: 11/23/2022]
Abstract
Lysozyme is a globular protein which is known to bind to negatively charged phospholipid vesicles. In order to study the relationship between charge state of the protein and its interaction with negatively charged phospholipid membranes chemical modifications of the proteins were carried out. Succinylation and carbodiimide modification was used to shift the isoelectric point of lysozyme to lower and higher pH values, respectively. The binding of the modified lysozyme to phospholipid vesicles prepared from phosphatidic acid (PA) was determined using microelectrophoresis and ultracentrifugation. At acidic pH of the solution all lysozyme species reduced the surface charges of PA vesicles. Succinylated lysozyme (succ lysozyme) reduced the electrophoretic mobility (EPM) to nearly zero, whereas native lysozyme and carboxylated lysozyme (carbo lysozyme) changed the surface charge to positive values. At neutral pH, the reduction of surface charges was less for carbo lysozyme and unmodified lysozyme. Succ lysozyme did not change the EPM. Unmodified and carbo lysozyme decreased the magnitude of EPM, but the whole complex was still negatively charged. The bound fraction of all modified lysozyme to PA vesicles at high lysozyme/PA ratios was nearly constant at acidic pH. At low lysozyme/PA ratios the extent of bound lysozyme is changed in the order carbo>unmodified>succ lysozyme. Increasing the pH, the extent of bound lysozyme to PA large unilamellar vesicles (LUV) is reduced, at pH 9.0 only 35% of carbo lysozyme, 23% of unmodified lysozyme is bound, whereas succ lysozyme does not bind at pH 7.4 and 9.0. At low pH, addition of all lysozyme species resulted in a massive aggregation of PA liposomes, at neutral pH aggregation occurs at much higher lysozyme/PA ratios. Lysozyme binding to PA vesicles is accompanied by the penetration of lysozyme into the phospholipid membrane as measured by monolayer techniques. The penetration of lysozyme into the monolayer was modulated by pH and ionic strengths. The interaction of lysozyme with negatively charged vesicles leads to a decrease of the phospholipid vesicle surface hydration as measured by the shift of the maximum of the fluorescence signal of a headgroup labeled phospholipid. The binding of bis-ANS as an additional indicator for the change of surface hydrophobicity is increased at low pH after addition of lysozyme to the vesicles. More hydrophobic patches of the lysozyme-PA complex are exposed at low pH. At low pH the binding process of lysozyme to PA vesicles is followed by an extensive intermixing of phospholipids between the aggregated vesicles, accompanied by a massive leakage of the vesicle aqueous content. The extent of lysozyme interaction with PA LUV at neutral and acidic pH is in the order carbo lysozyme>lysozyme>succ lysozyme.
Collapse
Affiliation(s)
- Olaf Zschörnig
- University of Leipzig, Institute for Medical Physics and Biophysics, Härtelstrasse 16-18, D-04107 Leipzig, Germany.
| | | | | | | | | |
Collapse
|
48
|
Kent MS, Yim H, Sasaki DY, Satija S, Majewski J, Gog T. Analysis of myoglobin adsorption to Cu(II)-IDA and Ni(II)-IDA functionalized Langmuir monolayers by grazing incidence neutron and X-ray techniques. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:2819-2829. [PMID: 15835159 DOI: 10.1021/la036207y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The adsorption of myoglobin to Langmuir monolayers of a metal-chelating lipid in crystalline phase was studied using neutron and X-ray reflectivity (NR and XR) and grazing incidence X-ray diffraction (GIXD). In this system, adsorption is due to the interaction between chelated divalent copper or nickel ions and the histidine moieties at the outer surface of the protein. The binding interaction of histidine with the Ni-IDA complex is known to be much weaker than that with Cu-IDA. Adsorption was examined under conditions of constant surface area with an initial pressure of 40 mN/m. After approximately 12 h little further change in reflectivity was detected, although the surface pressure continued to slowly increase. For chelated Cu2+ ions, the adsorbed layer structure in the final state was examined for bulk myoglobin concentrations of 0.10 and 10 microM. For the case of 10 microM, the final layer thickness was approximately 43 A. This corresponds well to the two thicker dimensions of myoglobin in the native state (44 A x 44 A x 25 A) and so is consistent with an end-on orientation for this disk-shaped protein at high packing density. However, the final average volume fraction of amino acid segments in the layer was 0.55, which is substantially greater than the value of 0.44 calculated for a completed monolayer from the crystal structure. This suggests an alternative interpretation based on denaturation. GIXD was used to follow the effect of protein binding on the crystalline packing of the lipids and to check for crystallinity within the layer of adsorbed myoglobin. Despite the strong adsorption of myoglobin, very little change was observed in the structure of the DSIDA film. There was no direct evidence in the XR or GIXD for peptide insertion into the lipid tail region. Also, no evidence for in-plane crystallinity within the adsorbed layer of myoglobin was observed. For 0.1 microM bulk myoglobin concentration, the average segment volume fraction was only 0.13 and the layer thickness was < or = 25 A. Adsorption of myoglobin to DSIDA-loaded with Ni2+ was examined at bulk concentrations of 10 and 50 microM. At 10 microM myoglobin, the adsorbed amount was comparable to that obtained for adsorption to Cu2+-loaded DSIDA monolayers at 0.1 M. But interestingly, the adsorbed layer thickness was 38 A, substantially greater than that obtained at low coverage with Cu-IDA. This indicates that either there are different preferred orientations for isolated myoglobin molecules adsorbed to Cu-IDA and Ni-IDA monolayer films or else myoglobin denatures to a different extent in the two cases. Either interpretation can be explained by the very different binding energies for individual interactions in the two cases. At 50 microM myoglobin, the thickness and segement volume fraction in the adsorbed layer for Ni-IDA were comparable to the values obtained with Cu-IDA at 10 microM myoglobin.
Collapse
Affiliation(s)
- M S Kent
- Department 1851, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
| | | | | | | | | | | |
Collapse
|
49
|
Mbamala EC, von Grünberg HH. Charged colloids and proteins at an air-water interface: the effect of dielectric substrates on interaction and phase behavior. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2003; 67:031608. [PMID: 12689081 DOI: 10.1103/physreve.67.031608] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2002] [Indexed: 05/24/2023]
Abstract
We study a two-dimensional (2D) system of macroions, trapped at the interface between air and an aqueous electrolyte solution, in the presence of a dielectric substrate approaching the air-water interface from the water side. Working within the linear Debye-Hückel theory, we investigate how the microion-averaged interaction potential between the macroions is affected by the presence of the dielectric substrate. Using these potentials in a Monte Carlo simulation, we further study the changes in the structural and phase behavior of the 2D colloidal system in response to the approaching substrate. Our scope of investigation covers two classes of colloidal particles, namely, highly charged latex particles of tens of nanometers radius, and protein particles of few nanometers radius carrying relatively small numbers of total charge. Probing the bond-orientational order parameter Phi(6) as a function of the 2D particle surface fraction phi(surf) and the air-water-substrate-water separation distance L, our simulations show that structural formations at the air-water interface are strongly influenced by the presence and the dielectric nature of the supporting substrate. Specifically, our [phi(surf): L] phase diagrams reveal that the transition from the fluid to the crystalline phase is shifted to higher surface fractions, if the approaching substrate is metallic, and to lower surface fractions, if it has a very low dielectric constant. These phase diagrams may be useful for finding materials and substrate interfaces for growing, e.g., 2D crystals of protein particles.
Collapse
Affiliation(s)
- E C Mbamala
- Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany
| | | |
Collapse
|
50
|
Kitano H, Saito T, Kanayama N. Substrate Monolayers as Electrochemical Sensing Elements for α-Chymotrypsin. J Colloid Interface Sci 2002; 250:134-41. [PMID: 16290644 DOI: 10.1006/jcis.2002.8312] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2001] [Accepted: 02/21/2002] [Indexed: 11/22/2022]
Abstract
A disulfide, which carried two L-phenylalanyl p-nitroanilide (Phe-pNA) moieties at both ends, was prepared by the coupling of 11,11'-dithiodiundecanoic acid (DTUA) with Phe-pNA. The compound obtained (DTUA-Phe-pNA) formed a self-assembled monolayer (SAM) on a gold electrode and vacuum-evaporated gold thin film as proven by cyclic voltammetry, and reflection absorption spectroscopy, respectively. Incubation of alpha-chymotrypsin with the SAM-modified electrode induced both a decrease in anodic and cathodic peak currents (-DeltaIa and -DeltaIc) and an increase in potential difference (DeltaEp) in the cyclic voltammogram of potassium ferricyanide as a probe, which suggested the attack of the enzyme at the amide group between Phe and pNA groups of the SAM, resulting in the formation of an intermediate. The linear relationship between the initial rate of increase in the amount of enzyme bound to the SAM and in both DeltaIa (absolute value of the decrease in anodic peak current) and DeltaEp values was confirmed by the quartz crystal microbalance method. The binding rate of the enzyme to the Phe-pNA SAM was dependent on the surface density of the Phe-pNA group in the SAM. The alpha-chymotrypsin-induced increases in the DeltaIa and DeltaEp values were inhibited by the addition of N-acetyl-D-phenylalanine methyl ester (N-Ac-D-Phe-OMe). In contrast with alpha-chymotrypsin, trypsin did not show a significant increase in the DeltaIa and DeltaEp values upon incubation with Phe-pNA-carrying SAM. These results could be attributed to the specific attack of alpha-chymotrypsin to the amide group in the SAM. The inhibition constant for N-Ac-D-Phe-OMe in the SAM system was quite similar to that in the free substrate system, showing that the enzymatic reaction above the SAM proceeds in a similar way to that in the homogeneous solution system.
Collapse
Affiliation(s)
- Hiromi Kitano
- Department of Chemical and Biochemical Engineering, Toyama University, Toyama, 930-8555, Japan
| | | | | |
Collapse
|